.announcement-board {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    width: 320px;
    height: 300px;
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow-y: scroll;
    padding-top: 1em;
    padding-bottom: 1em;
    padding-left: 2em;
    justify-content: center;
    align-items: center;
}

[contenteditable] {
    border: 3px solid #ccc;
    outline: none;
    border-radius: 0px;
    margin-top: 20px;
    margin-bottom: 20px;
    box-shadow: 0 5px 5px rgba(128, 128, 128, 0.5);
    resize: vertical;
    background-color: #f9f9f9;
    color: #333;
    width: 90%;
    min-height: 120px;
    box-sizing: border-box;
    /* word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: pre-wrap; */
    -webkit-touch-callout: auto;
    -webkit-user-select: auto;
    -khtml-user-select: auto;
    -moz-user-select: auto;
    -ms-user-select: auto;
    user-select: auto;
}

[contenteditable]:focus {
    border-color: #b39ddb;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}